What the hell is BTBA? BTBA (or BTB Airlines) was a deathmatch mod for Serious Sam:The Second Encounter from back in 2004.
It had vehicles,a proper physics engine and a new set of weapons

Ultimate Resource Pack

Collection by Solais

Ultimate Resource Pack
Mapper's resource pack for Serious Sam 3, by Solais, viper45, NHunter, Devostator, Batandy and many others of the Seriously! community.
Attention! Many Survival maps will need this pack to work, so I suggest downloading it.
At

Classic Serious Sam Mods

Collection by Biomechanoid

Did you ever hated how reloading always slows down the gameplay in Serious Sam 3? Ever felt like the jumping height was too low and made platforming a pain in the ass? Missed those classic weapon sounds and enemies? Well, you have come to the right place.

Survival Megapack

Collection by Solais

Survival Megapack by Solais (and with a help of the Seriously! community)
-Description-
A huge pack of Survival maps, originally intended to fix the Survival map shortage of the game. Its contents changed countless time, delayed and put on hiatus

Serious Fantasy: Legends (With all patches)

Collection by Pan

The full collection for SF:L Featuring all character packs and map packs from the original release up to Content Patch 6.

Serious Box Solid Collection

Collection by FunkyFinzy

Get all the required parts for Serious Box Solid in this one easy to use collection.
Additionally, if you want the campaign additions mod (optional), you can find it from here:
http://steamcommunity.com/sharedfiles/filedetails/?id=289449566
OPTIONAL men

Survival Ultrapack

Collection by Solais

The Survival Ultrapack
Noticing how some of the best Survival maps get almost no attention on the Workshop, just due to them being not on the very first page, I've decided to make this collection.
This collection contains my Survival Megapack, the Ul

Serious Fantasy Legends Mod

Collection by FunkyFinzy

Serious Fantasy Legends mod developed by Pan and Finzy, now on the Steam workshop! Subscribe to this collection to easily download all the required mod files! Serious Fantasy is a massive multiplayer mod pack, adding over 22 new versus maps, 69 player mode

Interesting Stuff (Serious Sam 3)

Collection by Ar2R-devil-PiNKy

Interesting Stuff for Serious Sam 3: BFE by Devil Games

Duke Nukem Mods!

Collection by noam 2000

A SS3 Modpack for all you DNF fans!

Serious Horsam Full Pack

Collection by noam 2000

A collection of the horsam mod + all its expansions.

Noam2000's Player Model Pack

Collection by noam 2000

A Collection of all the player models i have released for Serious Sam 3:BFE

Player Models Pack

Collection by noam 2000

a collection of all the player models for Serious Sam 3:BFE that are on the workshop.

SS3 - Unity Edition

Collection by Harbinger

This is for a mod that will be uploaded you'll need these resources to play

The Christmas Pack

Collection by Solais

Merry Christmas, everyone!
For this holiday, Toast and Solais is bringing you a special mod, just for the holidays!
---AND NOW, THIS PACK CONTAINS ALL THE CHRISTMAS CHEER RELEASED ON THIS WORKSHOP!---
With this mod installed, everything in the ga

Serious Swagger 360 : The MLG Encounter

Collection by noam 2000

Both parts for the Serious Swagger 360 : The MLG Encounter mod.

Approaching Hell

Collection by NHunter

Custom campaign aiming to be a prequel to SS3:BFE
<< Sam was on the mission to destroy Mental's communication tower in one of the
Egyptian cities, but his chopper was shot down. Thankfully, because he didn't
wear his seat-belt, Sam survived the crash.

Counter-Strike: Source Weapon Loadout

Collection by Vanya

A collection made out of all the Counter-Strike: Source weapon replacements I have done, made so users can browse them quickly and easily.
DO TAKE NOTE, Download all items button is disabled, in a future I will probably make more weapon replacements tha